Compound engine and pump.



No. 836,141. PATENTNN Nov. zo, 1906. J, D. RBBKIE.

GoMPoUND ENGINE NND PUMP.

APPLICATION FILED NOV. 27, 1905.

WITNESS@ v JNVENTOR.

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PATENT onirica.

JAMES D. REEKIE, OF DULUTH, MINESOTA.-

COMPOUND ENGINE AND PUMP.

,Specification of Letters Patent.

Patented Nov. 20, 1906.

Application led November 27, 1905. Serial No, 289.163.

T0 all whom t ymay concern:

Be it known that I, JAMES D. REEKIE, a citizen of the United States, residing at Duluth, in the county of St Louis and State of Minnesota, have'invented certain new and useful Improvements in Compound Engines and Pumps; and I do hereby declare the following to be a full, clear, and eXact description of, the invent-ion, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates t0 compound engines and pumps, and has for its object the construction, arrangement, and adjustment of means for automatically admitting steam direct from the boiler to the low-pressure cylinders when there is not suicient pressure of steam to operate the high-pressure ycylinders and when the column or pressure of water i from the pump is of less than a predetermined weight.

With this and such other objects in view as may be hereinafter disclosed it consists of the constructions, combinations, and arrangements of parts hereinafter described and claimed. A

In the accompanying drawings, Figure l is a perspective view of such parts of a compound dupleX pump as are necessary to describe my invention, showing my invention in connection therewith. Fig. 2 is a vertical central section, partly in side elevation, of one of the governors formingpart of my said invention.

Said pump, including `the governor 9 but exclusive of the governor 11, is, or is intended to be, substantially identical with the pump well known to the trade as the Fairbanks- Morse yCompound Duplex Pump, and said governor 9 and Ithe governor proper, 11, are substantially identical with the governor well known to the trade as the Fisher governor for steam-pumps. Ido not, therefore,

claim invention in the main portion of the pump separately or separately in said'govcrnors-or in the pump Vand the governor 9 alone, but in my arrangement and additional connections of the `governor and in the resultant combination. Neither doI desire to be limited to the use of theidentical structure illustrated, as it is obvious that said invention may be applied or extended to or embody 'modifications or .other styles of compound pumps, whether they be for pumping liquids or air or gases.

In the accompanying drawings, 1 is the high-pressure steam-cylinder, and 2 is the low-pressure steam-cylinder, and 3 is the pump-cylinder. 4 is a steam-chest for the high-pressure cylinder or cylinders, and 5 is an exhaust-conduit leading from the highpressure cylinder to the steam-chest 6 of the low-pressure cylinder. Since the pump illustrated is a duplex, these partsareinduplicate, the conduit 5 being longitudinallydvided 'by an interior partition-wall (not shown) to form two compartments, one of which connects the steam-cylinders on one side of the pump and the other ef which connects the steamcylinders on the other side of the pump.

7 is the air-pressure dome, and 8 is the Awater-discharge or reservoir pipe.

The steam-chests 4 are connected with the boiler through the valve 9"1l ofthe governor 9 by any suitable means, as by the pipe 10. Said valve 9a is provided with .an adjustable valve-stem 9b, terminating in a piston 9C, supported by a spring 9d, adapted Ato open said valve. Suitable `tension is effected in said spring .by lengtheninglor shortening said valve-stem by means of the wheel 19e., whereby the lower end of the valve-stem isscrewed 9c is inclosed in a cylinder 9f, forming part .of said governor, and said cylinder above said piston is connected by any suitable .means with the pipe or reservoir 8, as by the pipe'Qg.. Thuswhen the pressure of water in said pipe 8 is sufficient to counteract the tension of said spring 9d the piston '9C -is driven down and said valve 9a is closed. When said pressure is relieved, said valve is automatically opened by`said spring. If, lhowever, the steam-pressure should fall below `that required to operate lthe pistons in the high.- pressure cylinders, the Opening of the Vvalve in the governor 9 would vbe lwithout avail. This might occur in the temporary 4abfsence of the engineer or from various other temporary causes. In such case it kis-'desirable to operate the pistons in the low-pressure cylinders by direct pressure from the boiler, such latter pistons being capable 'of .operation under a much lighter pressure.

into the upper end of said stem. `Said pistonl Alfter the IOO steam-pressure has become heavy enough to again operate the high-pressure pistons it is desirable to cut oil` direct pressure from the low-pressure cylinders, so that the pistons therein can be more economically Worked by exhaust from the high-pressure cylinders. To accomplish these desires, I connect with the steam-chests of the loW-pressurecylinders the vgovernor 11, similar in all respects to the iirst said governor, except that in case of a duplex pump said governor is provided With a branched connection, the opposite branches 11a and 11b of which lead to the correspondingly-opposite steam-chests of the W-pressure cylinders and each of Which branches is provided With a return checkvalve 11 to prevent the flow of steam from one of thechests 6 to the other. It isobviously immaterial Whether said branches conneet directly with said steam-chests or with the corresponding compartments of the conduit 5. Said governor 11 is also connected to saidpipe 8 in manner substantially similar to that in which the governor 9 is connected to said pipe; but the valve ofthe governor 11 vis adjusted to close under a lighter Water-pressure than that under which the governor 9 is adjusted to close. Thus if the overnor 9 be adjusted to close at one hun red and thirty pounds Water-pressure4 and the governor 11 be adjusted to close at one hundred and iiiiteen pounds Water-pressure it Will be evident that so long as the steam-pressure is maintained at normal Weight to operate the higher-pressure pistons it will operate the machine to keep the Waterpressure near the normal Weight of one hundred and thirty pounds 5 but When the steampressure falls, 4so that the high-pressure pistons do not promptly operate When the valve of the governor 9 opens, ythe Water pressure might continue to fall to zero Were it not that when it has fallen to one hundred and iifteen pounds the valve of the governor 11 Will open, admitting steam direct from the boiler through the pipe l0 to the low-pressure cylinders, the pistons in Which then operate the pum to keep the Water-pressure at or near one liundred and fifteen pounds, thus greatly prolonging thev action of the engine under a subnormal steam-pressure.

V12 is the exhaust-pipe from the low-presv sure cylinders to the atmosphere or to a suitable condenser. (Not shown.)

. Having now described my invention, what I claim, and desire to secure by Letters Patent, is*

1. The combination with a compound engine and pump having high and loW pressure steam-cylinders connected to a steamboiler, and a reservoir for receiving the discharge 'of said pump, and a governor adapted v to control the admission of steam to said highpressure cylinder and to be operated by the pressure of the contents of said reservoir, of a second governor adapted to control the admission of steam directly from the boiler to the low-pressure cylinder and adapted to be operated by a lighter pressure of the contents of said reservoir than the pressure required to operate the iirst said governor.

2. The combination With a compound engine and pump, having a high and a loW pressure steam-cylinder connected to a source of steam-supply, and a reservoir for receiving the discharge of said pump, and a valve adapted to govern theadmission of steam direct from said source tosaid high-pressure cylinders, and means adapted to be operated by the pressure oi the contents of said reservoir to close said valve When said pressure is of a predetermined Weight, of a second valve adapted to govern the admission of steam direct from said source to said low-pressure cylinder and means adapted to closel said v valve and to be operated by the pressure of the contents of said reservoir at a predetermined lesser Weight than that required for closing the rst said valve, and means for automatically reopening said valves respectively When the closing-pressures are relieved.

3. The combination of a compound or multiple expansion duplex engine and pump, having high and lower pressure steam-cylinders connected to a source of steam-supply, and a -reservoir for receiving the discharge from said pump, and a valve adapted to govern the admission of steam direct from said source to said high-pressure cylinders, and means adapted to be operated by the pressure of the contents of said reservoir to close said valve When said pressure is of a redetermined Weight, of a second valve a apted to govern the admission of steam direct l'romsaid source to said lower-pressure cylinders, and means adapted to close said second valve and to be operated by the pressure of the contents of said reservoir at a predetermined lesser Weight than'that re uired for closing the rst said valve, and a ranched steamconducting connection interposed between said second valve and said lower-pressure cylinders and a return check-valve positioned in each branch of such connection and adapted to prevent the loW of steam from one of the lower-pressure cylinders to the corresponding cylinder on the opposite side of the engine.

4. The combination With a compound or multiple expansion engine and pump, of a source of steam-supply, a steam-conduit eX- tending from said source direct to the steam chest or chests of the low-pressure steam cylinder or cylinders, a valve adapted to be closed by pressure of a predetermined Weight of the discharge from said pump ,and adapted IIO to control the supply of steam throu hvsaid 1 of steam from one 10W-pressure cylinder to 1o conduit, and means for opening sai Valve the corresponding 10W-pressure cylinder on when said pressure is relieved. v p the opposite side of the engine.

5. The combination with a two-set com- In testimony whereofl I hereunto aHiX my pound or multiple expansion engine and signature in presence of tWo Witnesses. pump, of a source of steam-supply, e steam- JAMES D. REEKIE.

Conduit extending Jfrom said supply to Jshe Witnesses: steam-chests of the 10W-pressure cylinders, JAMES T. WATSON, and check-Valves adapted to prevenhthe ioW W. J. J OHNsON. 

